Accounting machine



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ACCOUNTING MACHINE Filed Jan. 6, 1937 9 Sheets-Sheet 3 :inventor Laurence N. Lehman Hi. Gttorneg May 27,` 1941. 1 v N. LEHMAN 2,243,806

ACCOUNTING MACHINE Filed Jan. 6, 1957 9 Sheets-Shea?l 4 Hh dumm,

May 27, 1941 L N. LEHMAN ACCOUNTING MACHINE Filed Jan.` e, 1937 9 Sheets-Sheet 5 Onu-...

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ACCOUNTING MACHINE Filed Jan. 6, 1937 9 Sheets-Sheet 7 5/ v lmaentor 498" 435 Laurence N. Lehman His Gttorneg May 27, 1941. 2,243,806

L. N. LEHMAN ACCOUNTING MACHINE Filed Jan. 6, 1937 9 Sheets-Sheet 8 SUB iwcz 3T ma; m i; FIG. 24 BALANCE 39g 403 l, '2404/6 4/5 //3 507 M0 a if( Q g. o 39?- Snventor Laurence N. Lehman Hi. Gttorneg May 27, 1941- Ly N. LEHMAN ACCOUNTING MACHINE Filed Jan. 6, 1937 9 Sheets-Sheet 9 Ill m3 OB 3 m3 um m f 4 EEE@ LSG

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my c *zo smi@ tuch Eu NmWmv-h- 3 rwentor Laurence N. Lehman Hi. Gttorneg Patented May 27, 1941 ACCOUNTING MACHINE Laurence N. Lehman, Dayton. Ohio, assigner to The National Cash Begiste r Company, Dayton,

Ohio, a corporation of Maryland Application January 6, 1937, Serial No. 119,255

(Cl. 23S-60) 29Clllms.

This invention relates to calculating, accounting and analogous machines and is particularly directed to an automatic overdraft mechanism for such machines.

The presen-t inventionis shown embodied in the well known Ellis type of accounting machine illustrated and described in Letters Patent of the United States No. 1,197,276, issued September 5, 1916, to Halcolm Ellis, U. S. Patent Nb. 1,303,- 863, issued November 7, 1916, to Halcolm Imis, and U. S. Patent No. 1,538,757 issued May 5, 1925, to F. W. Bernau.

It is-not the desire to limit this invention to the Ellis type of machine, as it may, with slight alterations, be adapted for use in most any type of accounting machine. Neither is it the desire to restrict the use of this invention to any particular bookkeeping system, as the ilexibility of the Ellis type machine and the numerous features thereof admirably adapt it for the handling of practically any accounting problem in connection with present-day business systems.

Broadly, it is an object of this invention to provide means to record the sub-total of an overdraft and .to retain the overdrailt in the balance totalizer for further computations.

Another object of this invention is the provision of means for recording the true negative balance of an overdraft and for preserving the complement of the overdraft for further computations.

Still another object of this invention is to furnish means to convert the complement of an overdraft into a true negative number so that the true negative number can be recorded, and to change the true negative number back into a complementary number, in preparation for further computations.

A further object is to supply a machine which functions automatically to register and record sub-totals and totals oi overdrafts.

A further object is the provision of means to control addition in certain of the totalizers during an overdraft operation.

A still further object of this invention is to supply means to automatically control the cycling of the machine in overdraft operations to cause a complement of an overdraft to be changed into a true negative amount, said true negative amount recorded, and the complement .thereof reentered in the balance totalizer in one continuous operation of the machine.

Another object is the provision of means to prevent the machine trom cycling until the manipulative means, which initiates overdraft operations, 1s fully depressed.

With these and incidental objects in view, the invention includes certain novel features of construction and combinations of parts, the essential elements of which are set forth in the appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

In the drawings:

Fig. 1 is a diagrammatic plan view of the keyboard.

Fig. 2 illustrates a facsimile of a fragment of a statement or ledger card used in the machine of this invention and its associated Journal sheet.

Fig. 3 is a side elevation as observed from the right of the machine, illustrating in particular the machine releasing mechanism, the machine driving mechanism and the overdraft mechanism.

Fig. 4 is a detail view of -the releasing and driving mechanisms and a part oi' the overdraft mechanism.

Fig. 5 is a detail view of a part of the mechanism for preventing unintentional repeat operations on the machine.

Fig. 6 is a detail view of the clutch mechanism of the present machine.

Fig, '1 illustrates in detail how depression of either of the overdraft keys couples the machine driving mechanism to the overdraft control mechanism.

Fig. 8 is a detail view of the driving means for the overdraft control cams.

Fig. 9 is a perspective view of the mechanism of the present invention. In perspective views such as this, where the dot-and-dash lines of the framework do not show in front of other parts, it indicates that such framework is in back of these parts.

Fig. 10 is a vertical sectional view taken just to the right of one of the amount banks, showing the manner in which the amount keys control the actuation of the totalizers and the printing mechanism.

Fig. 11 is a detail view of the mechanism that moves the inking ribbon to and from printing position. Y

Fig. 12 is a detail view of the mechanism for returning the ribbon color control shaft to normal or black printing position at the end of each machine operatim.

Pig. 13 is a detail view of a part of the ribbon color control mechanism.

Fig. 14 is a detail view, as observed from the left-hand side oi the machine, of the mechanism for locking the balance key against depression when the balance totalizer is overdrawn.

Fig. l5 is a detail view showing the position ol a part of the mechanism shown in Fig. 14 before the occurrence of an overdraft.

16 is a detail view showing the position of the mechanism shown in Fig. 15, after the occurrence of an overdraft.

Fig. iii- A is a detail view of the mechanism that restores the overdraft shaft to normal posi tion.

Fig. i7 is a left side elevation of the mechanism that controls the balance totalizer.

Fig. 18 is a detail view of the mechanism that prevents addition in the adding totalizers during an overdraft operation.

Fig. 19 is a detail of the engaging mechanism for the balance totalizer.

Fig. 20 is a left side elevation of the key releasing mechanism.

Fig. 2l illustrates the mechanism whereby the traveling carriage selects the #2 totalizer for addition.

Fig. 22 is a detail view of the cam that controls the engaging and disengaging of the auxiliary storage device.

Fig. 23 shows the mechanism operated by the cam shown in Fig. 22, for engaging and disengaging the auxiliary storage device.

Fig. 24 is a detail view of the Sub-credit balance key and a part of the mechanism associated therewith.

Fig. 25 is a detail view as observed from the front of the machine, showing the side-spacing of the Credit balance and Sub-credit balance keys and their associated parts.

Fig. 26 is a detail view of the Credit balance key and some of the parts associated therewith.

Fig. 27 is a detail View of the mechanism that returns the overdraft shaft to normal position at the ond of an overdraft operation.

Fig. 28 is a detail view of the arm that releases the Credit balance andI Sub-credit balance keys at the end of an overdraft operation.

Fig. 29 is a detail View, partially sectioned, of. the assembly of cams that control the machine in overdraft operations.

Fig. 30 is a detail View of the cam that controls the functioning of the balance totalizer in overdraft operations.

Fig. 3l is a detail view of the mechanism that retains the Credit balance and Sub-credit balance keys depressed' during overdraft operations.

Fig. 32 is a time chart graphically illustrating the movements of the diierent mechanisms or the machine in one cycle and multi-cycle operations.

Fig. 33 is a view showing one of the Stops for the wheels of the storage device.

GENERAL Das( :mPTIoN roll. The throat is automatically opened when the traveling carriage is returned to starting position.

When the traveling carriage reaches the terminus of its tabulated movement, it is automatically returned to starting position and in addition, by means of carriage return bars, may be returned from tabulated positions to pre-determined columnar positions.

'I'he machine is operated by a start-stop electric motor of conventional design, and this motor is set in motion by means of any one of three starting bars conveniently located on the righthand side of the keyboard. In addition to setting the machine in motion, one of the starting bars, when retained depressed, causes the traveling carriage to be returned to a. predetermined columnar position. This starting bar also causes the traveling carriage to be automatically tabulated from one column to the next. The second starting bar causes the platen roll to be rotated to linemspace recordI material carried thereby, and in addition prevents automatic tabulation of the traveiing carriage. The third starting bar causes the traveling carriage to be skiptabulated through one or more intervening columnar positions to a predetermined columnar position.

The machine embodying this invention has a Balance or add-subtract totalizer and three adding totalzers arranged in vertical pairs at the rear of the machine. The Balance totalizer is selected for addition and subtraction and the adding totalizers are selected for addition by means of control elements located in columnar positions on the traveling carriage, in cooperation with hanging bar levers. The other functions of the machine, including non-add, subtotal and total operations, are controlled by means of a row of control keys located on the extreme left of the keyboard.

The present machine has a plurality of denominational rows of amount keys, which, when depressed, position their corresponding actuators commensurate with the value thereof and the actuators in turn position their respective printing sectors and corresponding wheels of the selected totalizer or totalizers, in proportion thereto. In sub-total and total operations, the wheels of the selected totalizer position the amount actuators and the printing sectors to the amounts standlng on said wheels as they are returned to zero position. In total operations, the wheels of the selected totalizer are disengaged from the amount actuators after said wheels have been reset to zero, to leave the totalizer in a cleared condition, and in sub-total operations the wheels of the selected totalizer remain in engagement with the actuators after having been returned to zero and are returned thereby to their original positions. In subtract operations the wheels of the Balance totalizer are reversely rotated by the actuators to subtract therefrom the value of the amount set up on the amount keys.

Adding, subtracting, sub-total and total operations consist of one cycle of movement of the operating mechanism. In former machines, overdraft operations, in which the complementary amount of an overdraft was transposed to a true negative balance and this true negative balance recorded, consistedl of three cycles of movement of the operating mechanism. In the present machine, an overdraft operation consists of four cycles, during which either a sub-total or total of the overdraft may be recorded.

A sub-overdraft or sub-credit balance operation is initiated by the depression of a Subcredit balance key, and in the nrst cycle of said sub-credit balance operation the complementary amount of the overdraft is cleared from the Balance totalizer and added in an auxiliary storage device. In the second cycle of a sub-overdraft or sub-credit balance operation the auxiliary storage device is cleared and the complement of the overdraft is subtracted from the zeroized balance totalizer, leaving the true negative balance in said balance totalizer. In the third cycle the balance totalizer is again cleared and the true negative balance is added in the wheels of the auxiliary storage device and in the fourth cycle the auxiliary storage device is again cleared and the true negative balance stored therein is subtracted from the zeroized balance totalizer, leaving the complement of the overdraft in said balance totalizer, and in addition, the auxiliary storage device positions the type carriers to record the amount of the true negative balance.

It will be seen that in this type of overdraft operation the complementary amount of the overdraft is reentered in the balance totalizer and amounts may be added to and subtracted from this complementary overdraft in the usual manner. Depressing the Sub-credit balance key renders mechanism effective that causes the balance totalizer to be engaged with the actuators in the fourth cycle of an overdraft operation, and as explained above, the auxiliary storage device is cleared and the true negative balance is subtracted from the balance totalizer. However, when the credit balance or overdraft key is depressed, this mechanism is not rendered effective, and consequently the balance totalizer remains out of engagement with the actuators during the fourth cycle of an ovedraft operation and remains in a zeroized condition, in which condition it was placed during the third cycle of said' overdraft operation.

The occurrence of an overdraft in the balance totalizer is made manifest to the operator by the automatic locking of the balance key and the simultaneous unlocking of the Sub-credit balance and Credit balance keys. After the occurrence of an overdraft, if an amount is added into the balance totalizer large enough to overcome said overdraft, the Balance key is automatically unlocked and the Sub-credit balance and Credit balance keys are simultaneously locked against depression.

'IYhe machine starting or releasing mechanism is restored to normal or ineffective position at the end of each cycle of operation and is retained in said normal position by a latch mechanism that is controlled by the starting bars.` Depression of either the Sub-credit balance or the Credit balance key causes the latch mechanism for the machine starting mechanism to be latched in ineffective position and this causes the machine to cycle automatically until, near the end of the fourth cycle of operation, the depressed Sub-credit balance f or Credit balance key is released, which permits the latch mechanism to engage and retain the starting mechanism in ineffective or normal position.

In overdraft operations, the machine is controlled by an assembly of cams which are driven one revolution during the four cycles of an overdraft operation by a reciprocating slide which is connected to the machine operating mechanism by the depression of either the Sub-credit balance or Credit balance key. 1

The latch mechanism, that retains the Subcredit balance and Credit balance keys depressed during an overdraft operation, is arranged to prevent the starting mechanism from functioning until said keys are latched in depressed position.

Depressing the Credit balance key, which leaves the balance totalizer in a cleared state, causes the overdraft latch mechanism to be returned to normal position to unlock the Balance key and lock the Sub-credit balance and Credit balance keys against depression.

The printer mechanism is uncoupled from its driving means during the first three cycles of an overdraft operation to prevent the recording of undesirable and erroneous figures upon the record material. However, in the fourth cycle of an overdraft operation, the. printing mechanism is coupled to its driving mechanism so that the true negative balance will be recorded at this time.

The present invention also embraces mechanism that makes it necessary to tabulate the traveling carriage to certain predetermined columnar positions before the Sub-credit balance or Credit balance keys can be depressed.

The overdraft mechanism and other mechanism of the machine pertinent thereto will be described in detail in the ensuing pages.

DETAILED DESCRIPTION Framework The mechanism of the machine embodying this invention is supported by a right frame 50 and a left frame 5I (Figs. 3, 9 and l0) mounted upon a machine base 52, and rigidly supported in relation to each other by means of various crossframes and rods, one of said crossframes 53 being shown in Fig. 3. The mechanism of the machine is enclosed in a suitable case or cabinet 5I (Fig. 3) secured to the machine base. The case 54 has ways thereon, which, in cooperation with similar ways on the frame of a traveling carriage 55, support the rearward end of said traveling carriage for transverse tabulating movement. The front end of the traveling carriage is supported by means of rollers thereon, in cooperation with a track formed on the case 54. The traveling carriage 55 rotatably supports a platen roll 56 adapted to present record material carried thereby to an inking ribbon 51, a plurality of amount type sectors 58 and a symbol type secitor 59 (Figi. 3). The platen 56 is of front feed construction, which permits record material to be readily inserted and removed from in front of the platen without being wound around said platen roll. When the traveling carriage is returned to starting position4 the throat of the front feed device is automatically opened to facilitate the removal and insertion of record material.

'I'he front feed mechanism is not fully illustrated herein, but a full disclosure of this mechanism may be had by referring to the co-pending application for Letters Patent of the United States, Serial Number 653,838, which was filed January 27, 1933, by R. A. Christian.

After the printing stroke of each machine operation, the traveling carriage is automatically tabulated from one column to the next and in addition may be manually tabulated from one column to the next when desired. After the traveling carriage reaches the terminus of its tabulated movement, it is automatically returned to starting position and in addition, by means of manipulative devices, may be returned from tabulated positions to predetermined columnar positions.

A complete illustration and description of .the selective carriage return mechanism may be had by referring to the co-pending application for Letters Patent of the United States, Serial Number 732,252; which was filed Jun@ 25, i934, by it. A. Christian, which was issued on `inne Il, 1937, as Patent No. 2,082,098.

Operating mechanism rihe machine embodying the present invention is preferably operated by a start-stop electric motor, not here shown but of the type disclosed in the application for Letters Patent of the United States, Serial Number 697,449, which was filed November lo, 1933, by Charles "il, Arnold, and which issued on January 3, i939, as Patent No. 2,142,341. The operating motor is geared to a driving member 68 (Figs. 4, 6 and 9) of a clutch device, said driving member being rotatably mounted upon a pin Gli, secured in the motor frame. The driving member 68 cooperates with a driven clutch member C52, also rotatably supported by the pin Si and normally held out of engagement with the driving member 60 by means of a shoulder on said driven member in cooperation with a clutch release lever 63, loose on a stud 84 in the motor frame, and integral with a control lever 65.

An upward extension of the lever 65 is bifurcated to embrace a stud 68 in a pitman 61, the rearward end of which has a slot which slides on a stud B8 in the frame 58. The forward end oi the pitman 61 is pivotally connected to a release plate 69, turnably mounted on an auxiliary storage device shaft 19 journaled in the frames 50 and 5l. A stud 1i (Figs. i and in a lever 12 loose on a stud 13 in the frame 50, in cooperation with a shoulder on the plate 69, normally retains the clutch lever t3 in effective position, as shown in Fig. 4, against the action of a spring 14, which is tensioned to urge said clutch lever out oi engagement with the driven member t2 of the clutch device.

Depressing a machine starting bar 15, the upper end of which extends through an opening in a plate 16 secured to the frame 58 and which is slidably mounted by means of parallel slots therein in cooperation with stationary studs 11 and 18 secured in the frame 5u, causes a slot in said starting bar 15, in cooperation with a stud 19 in a lever 80, to rock said lever 89 counter-clockwise on its pivot 11. Counter-clockwise movement of the lever 8G, by means of a stud 8i therein in cooperation with a biurcated extension of a lever 82 fulcrumed on the stud 13, rocks said lever 82 clockwise. The lever 82 (Fig. 5) has parallel surfaces formed by fingers 83 and 84 which engage a bent-over ear 85 on a slide 85 mounted on the lever 12 by means of slots therein in cooperation with stationary studs in said lever 12.

A spring 81 tensioned between the lever 12 and the slide 86 urges said slide downwardly to normally maintain the ear 85 in coactive engagement with the fingers 83 and 84 whereupon clockwise movement of the lever 82, as explained above, carries the lever 12 in unison therewith. Clockwise movement of the lever 12 moves the stud 1I out of engagement with the shoulder on the plate B9 to release the lever 63 to the action of the spring 14, which disengages said lever from the shoulder on the clutch driven member 62 to operatively connect said driven member to the driving member 60. Counterclockwise movement of the lever 63 also operates a switch that starts the electric motor operating.

integral with thev clutch driven member 62 (Fig. e) is a crank 88 pivotally connected by a.

link 8S to a lever 90, secured on a main drive shaft 9i journaled in the frames 50 and 5l. The motor drives the clutch members 60 and 6i in a counter-clockwise direction and one revolution of the driven member 52, by means oi the crank 88 and the link 89, oscillates the lever Sii and the main driving shaft 9i rst counterclockwise and back to normal position through an approximate angle oi 60 degrees (see space A of chart 32). This counter-clockwise and clockwise movement of the main shaft 9i is Sutilcient to operate the machine in adding, subtracting, and total-taking operations and will be referred to as a machine cycle. After the clutch driven member 62 has completed one revolution of movement a camming surface 92 on the edge oi the crank 88, in cooperation with a roller 93 in a downward extension of the lever 65, rocks said lever and its companion lever 63 clockwise to move said lever 63 into the path of the shoulder on the clutch driven member and to return the plate 69 clockwise until the shoulder thereon moves beyond the stud 1l to permit the levers 12 and 82 to be returned to normal position by a spring pulled member 49 (Fig. 4) to move the stud 1I into the path of the shoulder on the plate 59, to retain the levers 63 and 65 in ineiiective positions, as here shown, when the camming surface 92 moves beyond the roller 93 (see space B of chart Fig. 32).

Counter-clockwise movement of the levers 12 and 82 to normal position also returns the lever 86 clockwise to restore the starting bar 15 upwardly to undepressed position. Return movement clockwise of the plate 69 (Figs. 4 and 5) causes a surface 94 thereon to engage a stud 95 in the slide 86 to shift said slide 8B upwardly to move the ear into an L-shaped opening formed by the ngers 83 and 84. In case the starting' bar 15 is inadvertently retained depressed, the L-shaped opening permits the lever 12 to be spring-returned counter-clockwise, in dependently of the lever 82 to move the stud 1I into the path of the shoulder on the plate G9 to prevent unintentional repeat operations of the machine.

An extension 9G (Fig. 4) of the starting bar 15 underlies a. Skip-tabulating starting bar 91, the upper end of which is guided by an opening in the plate 16, and consequently depressing the starting bar 91 also depresses the starting bar 15 to release the machine for operation and in addition to cause the traveling carriage to be skiptabulated to a predetermined columnar position.

The upper end of a Vertical feed starting bar .t8 extends through an opening in the plate 16 while the lower end of the stem of said starting bar is slotted to receive a stud 99 in an extension of the lever 82. Therefore, depressing the starting bar 98 rocks the lever 82 clockwise to release the machine for operation in the manner explained above. Ordinarily the traveling carriage 55 (Fig. 3) tabulates automatically from one column to the next during machine operations. However, depressing the vertical feed starting bar 98, in addition to releasing the machine for operation, disables this automatic tabulating mechanism and causes the platen roll to be rotated to line-space the record material carried thereby.

'Ihe machine is also released for operation by depressing the Sub-credit balance or Credit balance keys.' However, this mechanism will be explained later in connection with the overdraft mechanism.

A iingerpiece of a carriage control lever (Figs. 1 and 4) protrudes through an opening in the plate and said lever is pivoted on a stud in a downward extension of said plate 10. The lever |00 has three positions, and when in its #l or upper position as here shown. the traveling carriage l0 and the starting bars 10, 01 and 00 function in the normal manner, as explained above. When the lever |00 is in its #2 or middle position, the automatic tabulation of the traveling carriage is disabled at all times, and when said lever is in its third or lower position, the automatic tabulation of the traveling carriage is disabled and the platen roll I0 is rotated each machine operation to line-space the material carried thereby.

A full disclosure of the lever |00, the machine starting bars, the tabulating mechanism. and the carriage return mechanism may be had by referring to the co-pending application for Letters Patentof the United States, Serial Number 732,252, which was filed June 25, 1934, by R. A. Christian, and which issued on June l, 1937, as Patent No. 2,082,098.

Keyboard The keyboard of the present machine comprises a plurality of. denominational rows of amount keys |0| (Figs. 1 `and 10), a row of control keys |02. and an add control key |00. The upper ends of said amount and said control keys extend through openings in a keyboard top plate |00. The amount keys 0| are supported in a framework composed of the plate |00 and a partition plate |00 (Fig. l0) for each row of keys, said partition plates each supporting the lower end of its respective row of keys. I'he control keys |02 and |00 control the different functions of the machine, including non-add, subtract, sub-total. total, and adding in the #1 and #2 totalizers. 'nie adding function of all totaiiaers is also controlled by means of control elements on the traveling carriage in cooperation with hanging bar levers in the well known manner.

Inasmuch as the actuator mechanism is practically duplicated in each row of amount keys, it is believed that a description of one row of amount keys and its associated actuator mechanism will. be sumcient for the purpose of this speciilcation. l

Depressing one of the amount keys |0|, in the particular row illustrated in Fig. l0. moves a square stud |00 near the bottom end thereof into the path of a corresponding step |00 on an amount actuator |01 mounted for horizontal reciprocating movement by means of a slotted rod |00 in cooperation with the forward end of said actuator |01 and by means of a slotted bar |00 in cooperation with the bifurcated rearward end of said actuator |01. The rod |00 and the bar |00 are supported by the frames 00 and Il. Depressing the amount key |0| also causes a pin ||0 therein, in cooperation with an angular camming surface on the nose of a corresponding hook-shaped projection on` a locking detent ||0 slidably mounted on the corresponding partition HVI plate |04 by means of four rollers ||1 iournaled on studs in said partition plate |04. to shift said locking detent ||0 rearwardly against the action of a spring ||0. The spring ||0 is tensioned between the locking detent ||0 and a control plate ||0 slidably mounted adjacent the detent ||0 by means of the rollers |i1.

When the pin ||0 moves below the corresponding hook on the detent ||0 the spring ||0 returns said detent forwardlyto move the hook over the stud to latch the key in depressed position. Depressing an amount key |0| also causes the pin ill, in cooperation with a corresponding angular camming surface in an opening of the control plate H0, to shift said control plate Ils forwardly against the action of the spring IIB. Forward movement of the control plate I i0 causes the forward end thereof, in cooperation with a bent-over ear of a zero latch |20 fulcrumed on a rod |2| supported by the keyboard framework, to rock said latch I 20 counter-clockwise out of engagement with a block |22 integral with the actuator |01 to free said actuator for reciprocating movement. A spring |20 tensioned betweenv the control plate ||0 and the latch |20 maintains the bent-over ear of said latch in contact with the forward end of said control plate H9. When no amount key is depressed in this particlular row, the zero latch |20, in cooperation with the block |22. retains the actuator |01 in zero position during a machine operation.

'I'he actuator |01 (Fig. 10) has therein a vertical slot |20 through which extends a stud |20 in a downward extension of a reducer segment |20 loose on a leading frame shaft |21 Journaled in the frames l0 and 0|. A spring |20, tensioned between the segment |20 and a leading frame cross-bar |20, normally maintains an edge of the segment |00 in contact with said bar |29. The leading frame bar |20 is integral with two similar downwardly extending arms |00, only one here shown. secured on the shaft |21. A link ill pivotally connects a rearward extension of the segment |20 to the amount type sector 00 for this particular row of keys, said type sector being pivoted to an arm |02, loose on a printer shaft |33 Journaled in the frame l0 and the printer framework.

Oscillation of the arm 00 (Fig. 3) in the manner explained previously, causes a roller |34 mounted thereon, in cooperation with a camming slot |00 in a plate |00 secured on the shaft |21, to rock said shaft |21 and the leading frame |20 (Fig. 10) first counter-clockwise and then back to normal position (see space C of chart Fig. 32). Initial movement counter-clockwise of the leading frame |20 by means of the spring |20 carries the segment |20 and the actuator |01 rearwardly in unison therewith until the step |08 on said actuator engages the corresponding stud |05 in the depressed amount key, to position said actuator |01, the segment |20, and by means of the link |0| the amount type sector 50 in proportion to the value of the depressed amount key. After the parts have been thus positioned the leading frame |20 completes its initial movement rearwardly, flexing the spring |20. After the segment |20 has been positioned, a roller |00 on the arm 00 (Figs. 3 and 9), similar to and on the same axis as the roller |00, in cooperation with a camming groove |01 formed in a plate 00 secured on an aliner shaft |00 iournaled in the frames 00 and 0|, rocks said plate |00 and said shaft |00 clockwise. Secured on the shaft |03 (Fig. 10) are two similar arms |40, only one here shown, between which extends an alining bar |4| adapted to cooperate with alining teeth in the periphery of an arcuate surface of the segment |26. Clockwise movement of the shaft |39 rocks the bar |4| into engagement with theteeth of the segment |26, to aline said segment, the actuator |01 and the printing sector 58 in set positions (see space D Fig. 32).

When the actuator |01 and the segment |26 move out of zero position a stud |42 in a forward extension of said segment |26, in cooperation with an arcuate surface |43 on the tail of a zero elimination pawl 44 pivoted on a shaft |45 supported in the printer framework, rocks said pawl counter-clockwise against the action of a spring |46. Counter-clockwise movement of the pawl |44 rocks a tooth thereon out of engagement with a similar tooth |41 on a plate |48 connected to the arm |32, to free said plate |48 and said arm |32 for printing movement.

After the leading frame |29 has completed its initial movement counter-clockwise and the actuator |01, the segment |26 and the printing sector 58 have been positioned, the printer shaft |33 receives movement, in a manner presently to be described, to cause the value of the depressed key to be recorded. The arm 90 (Fig. 24) carries a stud H0, which in all operations except overdraft operations, cooperates with a notch in the lower end of a link the upper end of which is pivoted at I2 to an arm ||3 flexibly connected to another arm |4 secured on the printer shaft |33. Initial movement counter-clockwise of the arm 90 moves the link and the arms 3 and 4 to rock the shaft |33 and a yoke |60 (Fig. 10) secured thereon clockwise to tension a spring |6| stretched between said yoke |60 and a pawl |62 pivoted on the arm |32. The pawl |62 has a tooth which engages a similar tooth on the plate |48 and forms a yielding connection between the arm |32 and the plate |48.

After the actuator |01, the segment |26 and the sector 58 have been positioned and the leading frame |29 has reached the terminus of its initial movement rearwardly, continued movement clockwise of the printer shaft |33, by means of mechanism not shown but well known in the art. rocks a trigger |49, pivoted in the printer frame, counter-clockwise out of engagement with a tooth |50 on the plate |48 to release the printing sector 58 to the action of the tensioned spring |6| to cause said printing sector in cooperation with the inking ribbon 51 interposed between said sector and record material carried by the platen roll 56 (Fig. 3), to record the value of the depressed amount key upon the record material (see space I of chart Fig. 32).

Return movement clockwise of the arm 90 returns the printer shaft |33 counter-clockwise. causing a rod |5| extending between the arms of the yoke |60 to engage the plate |48, to return said plate, the arm |32 and the sector 58 to normal positions as shown in Fig. 10. Return movement of the arm 90 also rocks the aliner iti (Fig. l) out ci engagement with the segment |26 and returns the leading frame |29, the segment |26 and the actuator lill' forwardly to zero positions. Prior to return movement of the actuator |01, the detent ||9 is shifted rearwardly to release the depressed amount key and as the pin i i no longer restrains rearward movement of the control plate H9, the zero latch E is free to engage the block |22 to latch the actuator and associated mechanism in zero positions.

Ordinarily, when no amount key is depressed, the zero elimination pawl |44, in cooperation with the tooth |41, restrains the type sector against printing movement when the trigger |49 is released. However, each pawl |44 has a bent-over ear, which overlies the corresponding pawl in the next higher order, and when a key is depressed in a higher order, the pawl |44 for that order rocks all the lower order pawls |44 to ineffective positions to permit printing movement of the type sectors of the lower denominations in order to record the zeros.

Totalizers The machine embodying this invention has four totalizers, a #l or add-subtract totalizer and three adding totalizers, numbered respectively, 2, 3 and 4. The #l and #2 totalizers (Fig. 10) are mounted in a framework |52 secured to the main frames 50 and 5| and the #3 and #4 totalizers are mounted in a framework |53, connected to the framework |52 by means of two end plates |54, only one here shown. The actuator |01 (Fig. 10) has teeth thereon arranged to cooperate with corresponding wheels of the #l and #2 totalizers, and an extension |55 thereof, the bifurcated end of which is supported by a slotted bar |56 mounted in the framework |53, has teeth similar to those on the actuator |01 to cooperate respectively with the corresponding wheels of the #3 and #4 totalizers.

In adding operations, the wheels of the selected totalizer or totalizers are engaged with the actuators |01 or the extensions |55 after the actuators and extensions have completed their initial movement rearwardly and remain engaged therewith during return movement forwardly thereof. This rotates the wheels or the selected totalizer forwardly in proportion to the amount set up on the keyboard. After the actuators |01 and the extensions |55 complete their return movement forwardly, the wheels of the selected totalizer are moved out of engagement therewith.

In subtracting operations, the wheels of the #i or balance totalizer are engaged with the actuators |01 prior to their initial movement rearwardly, which movement reversely rotates the wheels of the balance totalizer to subtract therefrom the amount set up on the amount keys |0|. In subtract operations, the wheels of the balance totalizer are disengaged from the actuators 01 prior to the return movement forwardly by the actuators.

The well known Ellis type of transfer mechanism disclosed in Patent #1,203,863, is used to carry amounts from lower to higher denominations. The balance totalizer has a dual transfer mechanism which is shifted from adding to subtracting position in subtract operations and when a wheel of a certain order is reversely rotated through zero position, a borrow of one unit from the next higher order is effected.

In total taking or recording operations as in subtract operations, the wheels of the selected totalizer are engaged with the actuators |01 prior to the initial movement rearwardly by the actuators, and are reversely rotated thereby until stopped in zero position by contacting their corresponding add transfer pawls. This positions the actuators |01 and the amount type sectors 50 commensurate with the amount on the totalizer wheels. In total taking or recording operations, the wheels of the selected totalizer are disvthe actuators |01 during the return movement forwardly by the actlmtors, and are consequently returned to their original positions instead of being left in a cleared state.

Totalizer engaging mechanism As the engaging mechanism is practically the same for all four totalizers, it is believed auflicient to describe the engaging mechanism for the balance totalizer only.

Referring to Figs. 10, 17 and 19, the shaft that supports the wheels of the balance or #1 totaliser is mounted in a rockable frame composed of two end plates |01, only one here shown, pivoted on studs |I in the frame |02, and a partition plate (not shown) for each denominational order. The end plates |01 and the partition plates are connected in nxed relation by a bail |00. Each of the arms |51 carries a roller |00, which cooperates with a corresponding camming groove |00, in a cam |01, only one here shown, secured Y on a totalizer ensuing shaft |00 icurnaled in the totalizer framework |02. Also secured on the shaft |00 is a crank |00 pivotally connected bya link |10 to a living lever |1| (Fig. 17) fulcrumed at |12 to a totallser engaging plate |10 secured on the main drive shaft 0|. 'I'he nying lever |1| has pivoted thereon a pawl |14 urged counterclockwise by a spring |10 into contact with astop stud on said ying lever |1|. An upward extension of the pawl |10 coopu-ates with a stud |10 in a control crank |11 pivoted at |10 to the frame 0|. The stud |10 is embraced by the bifurcated upper end of a pitman |10 (Figs. 17 and 18), the lower end of which is pivotedto alever I00looseonastud |0| intheframe 0|. Integral with the lever |00 is a shoe |02 arranged to cooperate with an arcuate surface |00 on the plate |10.

When the traveling carriage is tabulated to a columnar position, where it is desired to select the #1 totalizer for addition, a control element on said traveling carriage engages a #l hangingbarleverandraisesa'lhangingbar |00 (Fig. 17). The -lower end of the #1 hanging bar |00 is pivotally connected to a crank control latch |00 pivoted at |00 to the frame 0| and upward movement of the bar |00 rocks the latch |00 counter-clockwise out of engagement with a tooth on the lower end of the crank |11. As previously explained, the plate |10 cscillates rst clockwise as viewed in Figs. 11 and 18, and then back to normal position in adding, subtracting, and total-taking operations. Initial movement clockwise of the plate |10 moves the surface |00 thereon beyond the shoe |02 to release the lever |00, the pitman |10 and the crank |11 to the action of a spring |01, which moves said crank counter-clockwise to move the pin |10 out of the path of the upper end of the pawl |10. Continued movement clockwise of the plate |10 causes the flying lever |1| to move relatively thereto until a downward extension |00 of the pawl |14 is engaged by a square stud |00 in said plate |10. This causes the ilying lever |1| to move in unison with the plate |10 during the remainder of its clockwise movement, and clockwise movement of said lever |1I by means of the link |10 carries the crank |00, the shaft l, and the cams |01 (Fig. 19) counter-clockwise. Counter-clockwise movement of the cams |01, by means of the slots |00 in cooperation with the rollers |00, rocks the #l totalizer frame clockwise to engage the wheels of said totalizer with the teeth in the top edge of the actuators |01 after said actuators have completed their initial movement rearwardly. The #1 totalizer wheels remain in engagement with the actuators |01 during the return movement forwardly by the actuators and are rotated thereby a distance proportionate to the value of the depressed amount keys.

After the actuators |01 have completed their return movement, which movement it will be recalled is eifected during return movement counter-clockwise of the shaft 0| and the plate |10, continued movement of said plate |10 causes a stud |00 (Fig. 17) carried thereby to engage a raised surface of the flying lever |1| whereupon Bald flying lever moves in unison with said plate |10 to rock the crank |80 and the shaft |00 clockwise to disengage the wheels of the #1 totalizer from the actuators |01 (see space E Fig. 82). Near the end oi' the return movement counter-clockwise of the plate |10, the arcuate surface |00 engages the shoe |02 and rocks the lever |00 clockwise, which movement, by means of the pitman |10 in cooperation with the stud |10, returns the crank |11 also clockwise so that the lower end thereof may be engaged by the latch |00.

When the traveling carriage is not tabulated to a column in which the balance or #1 totalizer is to be selected for operation, the latch Ill (Fig. 1'1) remains in engagement with the tooth of the crank |11. This obstructs counter-clockwise movement of the crank |11 and retains the stud |10 in the path of the upper end of the pawl |10. This causes the stud |10 to engage the pawl |10 to rock the extension |00 out of the path of the stud |00 during initial movement clockwise of the plate |10. It is therefore oblvious that under these circumstances no counterclockwise engaging movement is imparted to the crank |00 and the shaft |00, therefore, the wheels of the No. 1 totalizer are not engaged with the actuators |01.

Depreasing the Non-add key |02 (Fig. 1) rocks an obstruction into the path of the crank 11 to prevent counter-clockwiseV movement of said crank upon downward movement of the pitman |10, which in turn prevents the #l totalizer from being engaged with the actuators when the traveling carriageis tabulated to a #1 add position. Depressing the #1 add key |00 (Figs. 1 and 17) rocks the latch |00 counter-clockwise to ineffective position in a well known manner.

Subtract key- Calling attention to Figs. 1 and l'l, depressing the Subtract key |02 moves a notch |0| therein opposite a bent-over ear |02 on an arm |00 pivoted on a stud |04 in the left frame 5|. 'Ihis permits a spring |05, which normally maintains the ear |02 in contact with the edge of the key |02, to urge the arm |00 clockwise. Clockwise movement of the arm |00 causes a projection on the lower end thereof, in cooperation with a stud |00 in a lever |01 pivoted on the stud |00, to rock said lever clockwise in unison therewith. Clockwise movement of the lever |01 causes a stud |00 in the lower end thereof, in cooperation with a camming surface on a total taking control lever |99 fulcrumed on a stud 200 in the frame to rock said lever |99 also in a clockwise direction. Clockwise movement of the lever |99 moves the ends of spring-pulled pawls 20| and 202 into the path of a downward extension 203 of the flying lever |1|, to the positions indicated by dot and dash lines in Fig. 17.

Initial movement clockwise of the plate |13 causes the projection 203 to engage the pawl 20| to rock the crank |69 and the shaft |68 counterclockwise (see also Fig. 19) to engage the wheels of the #1 totalizer with the actuators |01 prior to the initial movement rearwardly by the actuators. Initial movement rearwardly of said actuators |01 reversely rotates the wheels of the balance totalizer to subtract therefrom the amount set up on the amount keys. After the balance totalizer has been engaged with the actuators, the end of the flying lever |1| rides off of the pawl 20| and near the end of the clockwise movement of the plate |13 the projection 203 of the flying lever |1| by-passes the pawl 202 and moves to the position indicated by dot and dash lines in Fig. 17. While the actuators |01 remain in their moved positions, return movement counter-clockwise of lthe plate |13 causes the projection 203 to engage the pawl 202 to rock the shaft |68 clockwise to disengage the wheels of the balance totalizer from the actuators (see space F of chart Fig. 32). After the wheels of the #l totalizer have been disengaged from the actuators, the arm |93 (Fig. 17) is rocked counterclockwise by the key releasing mechanism to move the ear |92 out of the notch |9| to permit the subtract key |02 to be spring-returned upwardly to undepressed position and to permit a spring 2|| to return the lever |91 to normal position, whereupon the lever |99 and associated parts also return to normal position.

In Figs. 14, l5 and 16, the highest order wheel 204 of the #l totalizer is shown with its associated add transfer pawl 205 and subtract transfer pawl 206. The pawls 205 and 206 have teeth which are arranged to cooperate with diametrically opposed teeth on a tripping cam 201 integral with the highest order wheel 204. In subtract operations the add transfer pawls are rocked out of the path of the teeth of the tripping cams 201 and the subtract transfer pawls are simultaneously rocked into the path of said teeth- In this description the wheel 204 and the highest order pawls 205 and 206 will be representative of all the totalizer wheels and all the add and subtract tripping pawls for the #l totalizer.

Clockwise movement of the lever |91 (Fig, 1'7), when the Subtract key 02 is depressed, by means of a link 208 rocks a lever 209 counterclockwise on its pivot 2 l5, see also Fig. 9. Counter-clockwise movement of the lever 209 retracts a stud 2|6 in a rearward extension thereof from the bottom surface of a hook 261 pivoted on the upper end of a lever 2|6 secured on a transfer pawl shifting shaft 2|9 journaled in the totalizer framework |52. Retraction of the stud 2|6 permits a spring 220 to move the hook 2|1 downwardly into engagement with a stud 225 which pivotally connects the rearward end of the link to the crank |69. Counter-clockwise engag ing movement of the crank |69 and the shaft |68, after depression of the Subtract key and upon initial movement clockwise of the plate |13, causes the stud 22| to engage the hook 2|1 to rock the lever 2|8 and the shaft 2|9 clockwise until a square stud 2i@ in a downward extension of said lever 2|8 moves beyond a retaining notch 222 in a pawl 223 pivoted on a stud 224 in the framework |52, whereupon a torsion spring 226 urges said pawl 223 clockwise to engage the notch 222 with the stud 2|0 to retain the lever 2|8 and the shaft 2|9 in moved positions. This clockwise movement of the shaft 2 |9 to the position shown in Fig. 14 causes a projection 226 on said shaft to move away from an extension 221 on the subtract pawl 206 to permit the tooth of said pawl to be spring-pulled into cooperative relationship with the tripping teeth on the cam 201. Clockwise movement of the shaft 2|9 also causes the projection 226 in cooperation with a camming surface on the add pawl 205 to rock said pawl counter-clockwise against the action of a spring, to move the tooth of said pawl out of cooperative ifltionship with the teeth of the tripping cam It is therefore obvious from the foregoing description, that the add pawls 205 remain inactive during a subtract operation and the subtract pawls 205 remain inactive during other operations of the machine.

Near the end of the return movement counterclockwise of the engaging plate |13 (Fig. 17), a stud 228 carried thereby engages the forward end of a lever 229 pivoted on the stud |8| to rock said lever clockwise, which movement by means of a stud 230 in said lever, in cooperation with a forward extension of the pawl 223, rocks said pawl counter-clockwise to disengage the notch 222 from the stud 2|0 to release the lever 2|8 and the shaft 2|9 to the action of a spring 23|. The spring 23| returns said lever 2|9 and said shaft 2|9 counter-clockwise to normal position, as here shown, which position is determined by the stud 2|0 in cooperation with a notch 232 in the pawl 223. Initial movement clockwise of the engaging plate |13 withdraws the stud 228 from the lever 229 to release the pawl 223 to the action of `the spring 225 to permit the notch 222 to engage the stud 2|0 to retain the shaft 2|9 in clockwise position during subtract operations as explained above. A stud 233 in the frame 5|l in cooperation with a notch in the lever 229, limits the movement of said lever.

Subtract control elements (not shown) located in predetermined columnar positions on the traveling carriage, in cooperation with the usual subtract hanging bar mechanism, will also cause the lever |91 to be rocked clockwise to condition the Balance totatlizer for a subtract operation when the traveling carriage is tabulated to a Subtract column.

Ribbon mechanism When the machine is at rest, the inking ribbon 51 (Fig. 3) is lowered to a position below the printing line so that the last entry on the record material will be visible. The inking ribbon 51 is a two-color ribbon, the upper portion being black and the lower portion red (Fig, 1l), and in adding operations the black portion of the ribbon is lifted to printing position so that additive items will be recorded in black, It is desirable that subtractive items be readily distinguishable from other items; consequently in subtract operations the inking ribbon 51 is raised to red printing position, and this is effected in the following manner:

The inking ribbon 51 lFigs. 3 and il: if: threaded through loops on the prongs of a lifting fork 235 supported for vertical shifting move ment in a bracket (not shown) secured to the printer framework. The lower end oi' the fork 235 has two bent-over ears 236 with matched slots, which embrace opposite ends of a stud 231 secured in the forward end of a lever 236 pivoted at 239 to a cross frame 240 (Figs. 9, and 17 A link 24| connects the rearward end of the lever 236 to one arm of a yoke 242, pivoted on trunnions 243 in the frame 240. Another arm of the yoke 242 carries a stud 244 which extends through a slot in the rearward end of a link 245, the forward end of which is pivotaliy connected to an arm 246 secured on the printer shaft |33.

At the beginning of machine operation, initial movement of the shaft |33 and the arm 246, by means of the link 245, rocks the yoke 242 also clockwise. In adding operations, clockwise movement of the yoke 242 is terminated by a stud 241 therein coming in contact with a hook 243 pivoted on a bracket 249 secured to the frame 246. This causes the black or upper portion of the inking ribbon 51 to be raised to printing position so that additive items will be recorded in black. A spring 266 tensioned between the link 245 and the stud 244 in the yoke 242 permits said yoke 2 42 to be stopped in its black printing position before the arm 246 and the link 245 reach the terminus of their initial movements.

When the #l totalizer is conditioned for a subtract operation, counter-clockwise movement of the arm 209 (Fig. 1'7) moves a link 25|, the lower end of which is pivoted to said arm 209 and the upper end of which is slotted to receive a stud 250 in a link 25|, to lower a hook 252 on the forward end of said link into the path of a square stud 253 carried by the #l totalizer engaging link |10. A spring 254 forms a flexible connection between the links 25| and 26|, and normally maintains the stud 250 in the bottom of the slot in the link 26|. The rearward end of the link 25| is pivoted at 255 to the left arm of a yoke 256 rotatable on a shaft 251 journaled in the cross frame 240.

Initial movement forwardly of the link |10 at the beginning of a subtract operation causes the stud 253, when the link 25| has been lowered, to engage the hook 252 to shift the link 25| forwardly to rock the yoke 256 counter-clockwise as viewed in Fig. 17 and clockwise as viewed in Figs. 11 and 13. The righthand arm of the yoke 255 carries a bushing 256, which forms a bearing on the shaft 251, and said bushing has secured thereon an arm 259 carrying a stud 265 which cooperates with a slot 266 in the hook 246. Clockwise movement of the yoke 256 and the arm 259, by means of the stud 265, rocks the hook 246 counter-clockwise out of the path of the stud 241, whereupon initial movement clockwise of the shaft |33 and the arm 246, by means of the mechanism shown in Fig. 11, raises the red portion of the inking ribbon 51 to printing position so that subtractive items will be printed in a distinctive color.

An upward extension 261 (Figs. 12 and 13) of the right arm of the yoke 256, in cooperation with a stud 256 in a bar 269 slidably supported in a slot in the frame 246, shifts said bar 269 rearwardly when the yoke 256 is rocked clockwise, in the manner explained above. The bar 269 carries a stud 216, which extends through a slot in a pawl 21|, urged rearwardly and clockwise by a spring 212 to normally maintain an ear 213 on said pawl in contact with the bottom of a notch in the bar 269. Initial movement clockwise of the printer shaft |33 and the arm 246 causes a. stud 214 in said arm, in cooperation with the slotted lower end of an arm 215 pivoted at 216 to the printer framework, to rock said arm 215 also clockwise to cause the upper end of said arm to by-pass the pawl 21|, which was moved to the position indicated by dot and dash lines in Fig. 12 when the yoke 255 was rocked to red printing position. Return movement counterclockwise of the arms 245 and 215 causes said arm 215, in cooperation with the pawl 21|, to return the bar 269 forwardly, which by means of the stud 266 restores the yoke 256 (Figs. 11 and 13), the crank 259 and the hook 246 to black printing position as here shown. An angular tooth 262 of a spring pulled pawl 263 pivotaliy connected-to a downward extension of the. right arm of the yoke 256, in cooperation with a shaft 264 journaled in the frame 240 (Fig. 9), retains the yoke 256 in either of its two positions.

When the Subtract key |02 (Fig, 17) is restored to undepressed position by rocking the ear |92 of the arm |93 out of the notch |9|, the spring 2|| returns the lever |91 counter-clockwise to normal position, as here shown, to return the link 25| upwardly out of the path of the stud 253.

Balance operations Balance operations or total taking operations from the #I totalizer are similar to subtract operations with the exception that all inadvertently depressed amount keys are automatically released at the beginning of said balance operation, and the transfer mechanism remains in adding position.

Depressing the Balance key 02 (Figs. 1 and 17) moves a notch 216 therein opposite a bentover ear 219 on an arm 260 pivoted at 26| to the left frame 5|. 'I'his frees the arm 290 to the action of a spring 262, which urges said arm clockwise to engage the ear 219 with the notch to retain the Balance key in depressed position and to cause a downward projection on the arm 290, in cooperation with a stud 263 in a lever 264 pivoted on the stud 26|, to rock said lever 264 also clockwise. Clockwise movement of the lever 264, by means of a stud 265 in the lower end thereof in cooperation with a camming surface on a total control lever 266 pivoted on` the stud 200, rocks said lever 266 also in a clockwise direction. Clockwise movement of the lever 265 by means of a forward projection thereof in cooperation with a stud 261 in the lever |99, rocks said lever |99 clockwise in unison therewith to move the pawls 20| and 202 upwardly into the path of the projection 203 of the flying lever |1|.

As in subtract operations, initial movement clockwise of the engaging plate |13 causes the end of the ying lever |1| to engage the pawl 26| to cause shaft |66 to be rocked (see also Fig. i9 and space H Fig. 32) counter-clockwise to engage the wheels of the Balance totalizer with the actuators |01 prior to their initial movement rearwardly. Initial movement of the actuators |61 revolves the wheels 204 of the Balance totalizer reversely or in a clockwise direction, as viewed in Figs. 14 and 16-A, until said wheels are stopped in zero position by one of the diametrically opposed teeth on the tripping cams 261 engaging the add tripping pawls 265. This, as formerly explained, positions the actuators and the type carriers commensurate with the amount on the #1 totalizer wheels 264, and while the actuators |61 remain in their moved positions, return movement counter-clockwise of the plate |13 (Fig. 17) causes the projection 263 of the flying lever to engage the pawl 202 to cause the totalizer wheels to be disengaged from the actuators. The return movement forwardly of the actuators |01 will have no effect on the Balance totalizer wheels, and said wheels will remain in zero position. Near the end of a Balance operation, the arm 280 is rocked counterclockwise in the well-known manner to release the Balance key |02 so that it may be springreturned upwardly to undepressed position, and counter-clockwise movement of said arm 280 permits a spring 280 to return the lever 284 counter-clockwise in unison with said arm to permit the pawls 20| and 202 to move down-a wardly out of the path of the projection 203 of the flying lever.

Depressing the Sub-total key |02 in conjunction with the Balance key causes the arm 280 to be rocked counter-clockwise to release the Balance key immediately after the actuators have completed their initial movement'l rearwardly (see space G Fig. 32). This permits the pawl 202 to drop downwardly out of the path of the projection 203 to cause the totalizer wheels to re.. main in engagement with the actuators |01 during the return movement forwardly by the actuators, so that said wheels will be returned to their original positions. After the actuators |'i' have completed their return movement, the stud |90 on the plate |13 engages the iying lever iii to disengage the wheels of the Balance totalizcr from the actuators.

NMi-add key There is a crank similar to the crank |11 (Fig. i7) for each of the four totalizers, and, as be fore stated, depressing the Non-add key |02 (Fig. 1) rocks an obstruction into the path of the lower end of these cranks to prevent counter=- clockwise movement thereof, irrespective of whether an Add key has been depressed or the traveling carriage tabulated to an Add column. This prevents engagement of any of the four totalizers with the actuators |01 and is appropriately called a Non-add operation. Such an operation is performed when it is desired to use the amount keys for printing various data, including department number, lock number, folio num.. ber, etc., without entering the values in the totalizers.

Amount key releasing mechanism Mechanism now to be described is provided i or automatically releasing the amount keys near the end of adding and subtracting operations and for automatically releasing any amount keys accidentally or inadvertently depressed prior to a total or sub-total operation. This mechanism that releases the amount keys also moves the zero latches out of engagement with the actu-= ators at the beginning of total and sub-total tak ing operations. Manual means is also provided for releasing the depressed amount keys.

Referring to Figs. i0, ll and 20, the Release key |02 has pivotally connected thereto one end of a link 289, the other end of which is bifurcated to straddle a stud 290 in a bar 29 slidably mounted by means of slots therein in cooperation with stationary studs in the frame 5|. Depressing the release key l02 shifts the bar 292 rearwardly, causing a stud 292 in an upward extension thereof, in cooperation with an inverted V slot in a crank 293 fast on a shaft 290 journaled in the keyboard framework, to rock said crank and said shaft clockwise, as

viewed in Fig. 20 and counter-clockwise, as viewed ln Fig. 10. Secured on the shaft 294 is an arm 299, carrying a stud 296, which in cooperation with angular camming surfaces on projections 291 and 298 of the detent |I6 and the control plate H9, shifts said detent and said control plate rearwardly and forwardly respectively against the action of the spring H8, when said crank 295 rocks in unison with the shaft 294. Rearward movement of the detent ||9 (Fig. 10) disengages one of the hooks therein from the pin ||5 of the depressed amount key |0| to permit said amount key to be spring-returned upwardly to undepressed position. The shifting of the control plate ||9 is incidental in this particular case, and is useful only in total and sub-total recording operation when such movement is used to disengage the zero latches from the amount actuators |01 when no amount keys are depressed.

Pivoted on a stud 293 in the slide 29| (Fig. is a pawl 300 urged counter-clockwise by a torsion spring to normally maintain a ilat surface on a hook thereof in resilient engagement with a roller 302 on a disk 303 secured on the main shaft 9|. Initial movement clockwise of the shaft 0| and the disk 30| causes the roller 302 to move beyond the hook on the pawl 300, whereupon the spring 30| immediately urges said pawl counter-clockwise to move the hook into the path of said roller 302. Return move ment counter-clockwise of the disk 303 causes the roller 302 to engage the hook to shift the pawl 300 and the slide 29| rearwardly to release the depressed amount keys in the manner explained above. Before the disk 303 completes its return movement counter-clockwise, an upward projection of the pawl 300 engages a stationary stud 304, which disengages the hook of said pawl from the roller 302 and permits return of the bar 29| by a spring 3||.

The mechanism described above automatically releases the depressed amount keys in non-adding, adding and subtracting operations. In total and sub-total recording operations it is necessary that the automatic amount key releasing mechanism function in the early part of an operation in order to release any amount keys lnadvertently depressed prior to said total or subtotal recording operation. In this case the functioning of the release mechanism is also used to shift the control plates ||9 forwardly in the beginning of sub-total and total recording operations to release the zero latches for the amount actuators |01.

Directing attention to Figs. 17 and 20, a latch 305 for the #2 add key |02 is pivoted on a stationary stud 306 and has pivotally connected to the lower end thereof a lever 301 spring-urged upwardly or clockwise to cause a stud 308 in a downward extension thereof, in cooperation with a tail of a key release pawl 309 pivoted at 3 I5 on a downward extension of the bar 29|, to restrain said pawl 309 against 'the influence of the torsion spring 30| to normally maintain a notch 3|6 in the rearward end of said pawl out of engagement with a roller 3|1 mounted on the lower end of a lever 3|8 pivoted at 3|9 to the left frame 5|. The lever 3|8 has a camming surface 320 urged into cooperation with a roller 32|, carried by the disk 303, by a spring 322.

Depressing the Balance key |02 (Fig. 17) causes the stud 205 in the lever 28d to rock the total control lever 286 downwardly or clockwise to engage a stud 323 in the downward extension of the lever 301 to rock said lever 301 downwardly or counter-clockwise against the action of the spring 3|0.

Counter-clockwise movement of the lever 301 (Fig. 20) withdraws the stud 300 from the tail of the pawl 309 to permit the spring 30| to rock the pawl 309 clockwise to engage the notch 3|6 with the roller 3|1. Initial movement clockwise of the main shaft 9| and the disk 303 causes the roller 32|, in cooperation with a lobe on the camming surface 320. to immediately rock the lever 3|9 clockwise to shift the bar 29| rearwardly to rock the crank 295 and the stud 296 downwardly to shift the locking detent ||6 rearwardly and the control plate ||9 forwardly (see also Fig. 10). Rearward movement of the detent ||6 releases any depressed amount key, prior to initial movement rearwardly of the actuator |01 and forward movement of the control plate ||9 rocks the latch |20 counter-clockwise out of engagement with the block |22 to free the actuator |01 so that it may be positioned by its corresponding wheel on the Balance totalizer.

After the bar 29| (Fig. 20) has been moved rearwardly sumciently to release the depressed amount keys and to move the zero latches to ine'ective positions, continued movement clockwise of the disk 303 causes a roller 324 thereon, in cooperation with a camming surface 325 on the pawl 309, to rock said pawl counter-clockwise out of engagement with the roller 3|1 to permit the bar 29| and connected parts to be returned to normal position by the spring 3|I, as here shown. When the lever 294 (Fig. 17-) is returned by the spring 299 counter-clockwise upon release of the Balance key, the lever 206 returns upwardly to normal position to permit the lever 301 to be returned clockwise or upwardly by the spring 3|0 to cause the stud 309 to again engage the tail of the pawl 309 to retain the notch 3|6 out of engagement with the roller 3|1.

The #2, #3 and #4 total keys |02 (Fig. l) also control the lever 301 (Fig. 20) in exactly the same manner as the Balance key.

Depressing the #2 add key |02 (Fig. 20) moves a notch 326 therein opposite a bent-over ear on the latch 305 to permit a spring 321 to urge said latch clockwise to shift the lever 301 rearwardly. This moves a curved rearward extension 329 of the lever 301 nearer to the roller 302 but ordinarily the roller 302 passes under the extension 320 and therefore does not move the lever 301. Depressing any of the total keys rocks the lever 301 downwardly in the manner explained above, to move the extension 329 into the pathof the roller 302, whereupon initial movement clockwise of the disk 303 causes the roller to engage Ithe extension to shift the lever 301 forwardly to disengage the ear of the latch 305 from the notch 326 to permit the #2 add key to be spring-returned to undepressed position. 'I'he reason for this is that total operations have precedence over adding operations. Rearward movement of the lever 301, when the #2 add key is depressed (Fig. 20), causes a stud 329 in said lever to move under a projection 330 of the pawl 300 to retain said pawl upwardly out of engagement with the roller 302,. This in eil'ect makes a repeat key out of the #2 add key and prevents the functioning of the key releasing mechanism and consequently the amount key and the #2 add keys remain depressed at the end of machine operation. The #2 add key and the amount keys may be released by depressing the Release key |92.

overdraft mechanism Where merchandise is sold on the installment plan or where charge accounts are carried by business establishments, one of the systems of bookkeeping employed is to add the charge items together and treat the total of these items as a debit balance. Payments made on account by customers are treated as credits, and these credits are subtracted from the debit balance. It often happens that a customer makes suilcient payments to overcome his debit balance and create a credit balance, or he may in some cases return a quantity of merchandise for credit and in this way create a credit balance. When a credit balance is established during a series of operations, it means that the Balance totallzer is in an overdrawn condition and contains the complementary amount of the credit balance. The operator is notified of this fact, when an attempt is made to take a balance, by the locking of the Balance key against depression.

In former machines of this type itwas possible, in an automatic overdraft operation, to transpose the complementary amount of an over- -draft to a true negative balance and record said true negative balance. See application of Charles L. Lee, Serial No. 605,160, which was filed April 14, 1932 and which was issued on May 4, 1937, as Patent No. 2,079,355. Furthermore, in a later machine disclosed in application of Paul H. Williams et al., Serial No. 104,650, which was filed October 8, 1936, it was possible to preserve the true negative balance in the Balance totalizer so that any desired number of repeat prints could be obtained thereof. However, the present invention goes a step further and provides selective means whereby, in one continul ous operation of the machine, the complement of an overdraft may be transposed to a true negative balance, said true negative balance printed, and the Balance totalizer left in a zeroized condition; or if desired, the complement of the overdraft may be reentered in the Balance totalizer in preparation for further computations.

The sub-credit balance and credit balance features are controlled by a Sub-credit balance key- 33| and a Credit balance key 332, which in some adaptations are appropriately termed, respectively, Sub-overdraft and Overdraft keys. Depressing the Sub-credit balance key causes the machine to operate automatically through four machine cycles to transpose the complementary amount of an overdraft to a true negative balance and record same. Depressing the Credit balance key causes the Balance totalizer to remain zeroized at the end of the operation and depressing the Sub-credit balance key causes the complementary amount of the overdraft to be reentered in the Balance totalizer.

A storage or stop device is used in conjunction with the Balance totalizer in transposing the complementary overdraft to a true negative balance and back to a. complementary overdraft. In sub-credit and credit balance operations the engaging of the storage device and Balance totalizer with the actuators and the disengaging of said storage device and totalizer from said actuators is controlled automatically. Following is a list of happenings in the different cycles of sub-credit and credit balance operations, it being understood that when the Balance totalizer is overdrawn it contains the complementary amount of the credit balance or overdraft. 

